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DYNAMIC AND THERMAL EFFECTS IN VERY LARGE SPACE STRUCTURES.

机译：在非常大的空间结构中的动力和热效应。

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摘要

An understanding of the problems associated with a very large light weight structure orbiting in space is of utmost importance at present. A knowledge of how the structure behaves under the influence of external disturbances in space should be available for any design and deployment of a structure in space. The life, efficiency, and function of the space structure are dependent on this knowledge.;Results are obtained for various initial conditions and physical parameter values. It is observed that the differential gravitational forces do not have any appreciable effects on the structure's axial length and its attitude motion. Thermal effects are significant in producing appreciable structural deformation, and they also affect the attitude motion of the structure considerably. The radiation pressure forces are very significant in changing attitude motion of the space structure, but it causes negligible effects in producing longitudinal deformation of the structure. All of the above factors have insignificant effects on the orbit of the structure chosen in this study. Of all the three external disturbances, the radiation pressure forces are found to be strongest in affecting the orbit of the structure.;A mathematical formulation has been developed for an axially flexible structure executing a planar motion in a general orbit in space in order to determine dynamic and thermal effects in the structure due to various disturbances in a space environment. The characteristic dimension of the structure is very large (of the order of a few kilometers). We have studied the influences of the differential gravitational forces, the radiation heating, and the radiation pressure forces. Effects of these factors have been studied on the structure's axial deformation, its attitude motion and its orbit simultaneously.
机译：目前，最重要的是了解与在空间中运行的非常大的轻质结构有关的问题。对于结构在空间中的任何设计和部署，都应可获得有关结构在空间外部干扰影响下的行为的知识。空间结构的寿命，效率和功能取决于此知识。；获得各种初始条件和物理参数值的结果。可以观察到，重力差对结构的轴向长度及其姿态运动没有任何明显的影响。热效应在产生明显的结构变形方面很重要，并且它们也显着影响结构的姿态运动。辐射压力在改变空间结构的姿态运动中非常重要，但在产生结构的纵向变形方面所产生的影响可忽略不计。以上所有因素对本研究中所选结构的轨道影响均不显着。在所有三种外部干扰中，辐射压力最强地影响结构的轨道。;已经为轴向挠性结构开发了数学公式，用于在空间的一般轨道中执行平面运动以确定结构由于空间环境中的各种干扰而在结构中产生动态和热效应。结构的特征尺寸非常大（大约几千米）。我们研究了重力引力，辐射加热和辐射压力的影响。研究了这些因素对结构的轴向变形，姿态运动和轨道的影响。

著录项

  • 作者

    MALLA, RAMESH BABU.;

  • 作者单位

    University of Massachusetts Amherst.;

  • 授予单位 University of Massachusetts Amherst.;
  • 学科 Aerospace engineering.
  • 学位 Ph.D.
  • 年度 1986
  • 页码 326 p.
  • 总页数 326
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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